Main and secondary beams for steel building structure and connecting structure of main and secondary beams

Abstract

The invention discloses main and secondary beams for a steel building structure and a connecting structure of the main and secondary beams. According to the main structure of the main and secondary beams, a main beam body comprises an upper chord and a lower chord, and diagonal web members are arranged between the upper chord and the lower chord; the center line of the diagonal web members obliquely intersects with the center line of the upper chord and the lower chord, reinforcing plates are arranged at the ends of the upper chord and the lower chord, and main connecting parts are arranged onthe upper chord and the lower chord; a secondary beam body structurally comprises a secondary upper chord and a secondary lower chord, and secondary diagonal web members are arranged between the secondary upper chord and the secondary lower chord; and the center line of the secondary diagonal web members obliquely intersects with the center line of the secondary upper chord and the secondary lower chord, auxiliary connecting parts are arranged at the ends of the upper chord and the lower chord, and the connecting forms of the auxiliary connecting parts and the main connecting parts are matched. The main and secondary beams for the steel building structure and the connecting structure have the beneficial effects that the standard connecting plates are additionally welded specially as for the common failing that local buckling and hole wall extrusion damage easily happen at the joint connection positions of cold-bent thin-wall structural steel; and the connection design of the joints ismore reasonable, the force bearing structures of all the chords are reliable, and the safety and the reliability of the overall structure are improved.

Description

technical field [0001] The invention relates to a cold-formed steel building structure system, in particular to a primary beam, a secondary beam and a connecting structure suitable for the steel building structure. Background technique [0002] The cluster intelligent assembly system is a new type of cold-formed steel building structure system; the cluster low-rise structure product is a product series of the cluster intelligent assembly system, and the main and secondary beams of the cluster low-rise structure and their connecting structures are an important part of the cluster low-rise structure products . At present, the common ribbed light steel structure with cold-formed steel as the core, its load-bearing floor beams are generally densely distributed solid-web C-shaped steel beams, the floor stiffness is not good, and the steel consumption is high; The truss girder method improves the rigidity of the floor, but it is found in the actual use process that its production...

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Problems solved by technology

At present, the common ribbed light steel structure with cold-formed steel as the core, its load-bearing floor beams are generally densely distributed solid-web C-shaped steel beams, the floor stiffness is not good, and the steel consumption is high; The truss girder method improves the rigidity of the floor, but it is found in the actual use process that its production is more complicated, and the strength of the connection joint between the web member and the chord is not high, and there is no strict joint check calculation, which has potential safety hazards; some studies have found that the joint As its weak link, it is easy to be damaged under extreme load conditions; in addition, the existing cold-formed steel truss beam structural components have a low degree of industrialization and cannot fully meet the needs of construction industrialization

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